Battery packs, battery modules and electrical equipment

Abstract

This utility model provides a battery pack, a battery module, and an electrical device. The battery module includes a housing, multiple battery cells, and a first adhesive portion. The multiple battery cells are disposed within the housing, with a first installation gap G1 between adjacent battery cells, wherein 2mm ≤ G1 ≤ 5mm. The first adhesive portion is disposed within the housing and at least partially fills the multiple first installation gaps to bond the multiple battery cells together. Directly bonding the multiple battery cells together via the first adhesive portion eliminates the complex assembly steps of the fixing bracket, simplifies the production process, and significantly improves assembly efficiency. By controlling the first installation gap between adjacent battery cells within the range of 2mm ≤ G1 ≤ 5mm, the ineffective space between battery cells can be effectively reduced. The first adhesive portion filling the first installation gaps further optimizes space utilization, allowing the housing to accommodate more battery cells, thereby increasing the energy density and total capacity of the battery module.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to battery packs, battery modules, and electrical equipment. Background Technology

[0002] Battery modules typically consist of multiple cells, which are usually secured using mounting brackets. This method leads to cumbersome assembly and, for ease of operation, results in a larger spacing between adjacent cells. Consequently, the number of cells that can be accommodated in the casing is reduced, thus lowering the battery module's capacity. Utility Model Content

[0003] The embodiments of this utility model provide a battery pack, a battery module, and an electrical device, which aim to simplify assembly operations and improve the battery module's electrical capacity.

[0004] In one aspect, embodiments of this utility model provide a battery module.

[0005] In one embodiment, the battery module includes:

[0006] case;

[0007] Multiple battery cells are disposed within the housing, and a first installation gap G1 is provided between two adjacent battery cells, wherein 2mm≤G1≤5mm;

[0008] A first adhesive portion is disposed within the housing and at least partially fills the plurality of first mounting gaps to bond the plurality of battery cells together as one unit.

[0009] In one embodiment, the first adhesive portion includes expanding foam.

[0010] In one embodiment, a bracket is further included, the bracket being installed within the housing, the bracket comprising:

[0011] The support plate is provided with multiple through holes, and the support plate is used to support multiple battery cells. The multiple through holes correspond to the explosion-proof valves of the battery cells.

[0012] Multiple protrusions are spaced out on the side of the support plate opposite to the battery cell. Each of the protrusions abuts against the inner wall of the housing, so that the support plate and the inner wall of the housing are spaced apart and form a smoke exhaust channel, which is used to discharge the gas discharged by the explosion-proof valve.

[0013] Secondly, this application also provides a battery pack, the battery pack comprising:

[0014] Box;

[0015] Multiple battery modules as described above are installed inside the housing.

[0016] In one embodiment, a plurality of the battery modules are arranged sequentially and are all connected to the bottom of the housing.

[0017] In one embodiment, a plurality of the battery cells are arranged to extend along a first direction and stacked along a second direction, the first direction being parallel to the extended plane of the bottom of the housing, and the second direction being perpendicular to the extended plane of the bottom of the housing.

[0018] In one embodiment, a second mounting gap is provided between two adjacent battery modules;

[0019] The battery pack further includes a second adhesive portion that fills the plurality of mounting gaps to bond the plurality of battery modules together.

[0020] In one embodiment, the second installation gap is G2, wherein 3mm ≤ G2 ≤ ​​8mm.

[0021] In one embodiment, the housing includes a positioning sidewall and a positioning bottom wall;

[0022] The battery pack also includes structural adhesive, and the positioning sidewall and / or the positioning bottom wall are connected to the inner wall of the housing through the structural adhesive.

[0023] In one embodiment, at least one of the positioning sidewall and the positioning bottom wall is provided with a positioning part, and the inner wall of the housing is provided with a mating part. One of the positioning part and the mating part includes a boss, and the other includes a groove.

[0024] In one embodiment, the housing further includes a mounting sidewall disposed opposite to the positioning sidewall;

[0025] The battery pack also includes a screw connector, and the mounting sidewall is screwed to the housing via the screw connector.

[0026] In one embodiment, a third adhesive portion is also included, through which the plurality of battery modules are bonded and fixed to at least a portion of the sidewalls of the housing.

[0027] In one embodiment, the housing is stepped, including a first stepped surface, a connecting surface, and a second stepped surface connected in sequence. The first stepped surface and the second stepped surface are both opposite to the bottom of the housing, and the second stepped surface is located between the first stepped surface and the bottom of the housing.

[0028] The battery pack further includes a first clamping part and a second clamping part, wherein the first clamping part is connected to a plurality of first stepped surfaces, and at least a portion of the second clamping part is connected to a plurality of second stepped surfaces.

[0029] In one embodiment, the second clamping part includes:

[0030] Pressure plate, connected to multiple second step surfaces;

[0031] Multiple connecting plates are sequentially connected along the circumference of the pressure plate and are all connected to the pressure plate. The multiple connecting plates include a first connecting plate and two second connecting plates disposed at both ends of the first connecting plate. The first connecting plate is disposed opposite to and connected to the connecting surface, and the two second connecting plates are connected to two side walls of the housing that are disposed opposite to each other.

[0032] Thirdly, this application also provides an electrical device, including the battery pack as described above.

[0033] The beneficial effects of the embodiments of this utility model are as follows:

[0034] In this embodiment of the invention, multiple battery cells are directly bonded together by the first adhesive part, eliminating the complex mounting bracket assembly steps, simplifying the production process, and significantly improving assembly efficiency. By controlling the first installation gap between two adjacent battery cells within the range of 2mm≤G1≤5mm, the ineffective space between the battery cells can be effectively reduced. The first adhesive part fills the first installation gap, further optimizing space utilization, allowing more battery cells to be accommodated within the casing, thereby increasing the energy density and total capacity of the battery module. The first adhesive part bonds multiple battery cells together to form an integral structure, enhancing the connection strength between the battery cells. The adhesive part can also absorb some external impacts and vibrations, improving the overall structural stability and vibration resistance of the battery module. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the structure of the battery module provided in an embodiment of this utility model;

[0037] Figure 2 yes Figure 1 The diagram shown is an exploded view of the battery module.

[0038] Figure 3 yes Figure 1 A cross-sectional view of the battery module shown.

[0039] Figure 4 yes Figure 3 A magnified view of part A shown below;

[0040] Figure 5 This is a schematic diagram of the structure of a battery pack (partial structure) provided in an embodiment of this utility model;

[0041] Figure 6 yes Figure 5 A top view of the battery pack shown;

[0042] Figure 7 yes Figure 6 A magnified view of part B shown;

[0043] Figure 8 This is a schematic diagram of the structure of the second pressing part provided in an embodiment of this utility model.

[0044] Explanation of reference numerals in the attached figures:

[0045] 10. Battery module; 11. Housing; 111. Positioning sidewall; 112. Positioning bottom wall; 113. Mounting sidewall; 114. First stepped surface; 115. Connecting surface; 116. Second stepped surface; 117. Exhaust vent; 118. Housing body; 119. Cover; 12. Battery cell; 13. First adhesive part; 14. Bracket; 141. Bearing plate; 1411. Through hole; 142. Protrusion; 15. Exhaust channel; 20. Box body; 30. Second adhesive part; 40. Structural adhesive; 60. Screw connector; 70. Third adhesive part; 80. First pressing part; 90. Second pressing part; 91. Pressure plate; 92. Connecting plate; 921. First connecting plate; 922. Second connecting plate. Detailed Implementation

[0046] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0047] Battery modules typically consist of multiple cells, which are usually secured using mounting brackets. This method leads to cumbersome assembly and, for ease of operation, results in a larger spacing between adjacent cells. Consequently, the number of cells that can be accommodated in the casing is reduced, thus lowering the battery module's capacity.

[0048] In view of this, the present invention proposes a battery module. Figures 1 to 4 This is a structural schematic diagram of an embodiment of the battery module provided by this utility model. The battery module provided by this utility model simplifies assembly operations and increases the battery module's capacity.

[0049] Reference Figures 1 to 4 The battery module 10 includes a housing 11, a plurality of battery cells 12, and a first adhesive portion 13. The plurality of battery cells 12 are disposed within the housing 11, and a first mounting gap G1 is provided between two adjacent battery cells 12, wherein 2mm≤G1≤5mm. The first adhesive portion 13 is disposed within the housing 11 and at least partially fills the plurality of first mounting gaps to bond the plurality of battery cells 12 together.

[0050] In this embodiment of the invention, multiple battery cells 12 are directly bonded together by the first adhesive part 13, eliminating the complex mounting bracket assembly steps, simplifying the production process, and significantly improving assembly efficiency. By controlling the first installation gap between two adjacent battery cells 12 within the range of 2mm≤G1≤5mm, the ineffective space between the battery cells 12 can be effectively reduced. The first adhesive part 13 fills the first installation gap, further optimizing space utilization, allowing more battery cells 12 to be accommodated within the housing 11, thereby increasing the energy density and total capacity of the battery module 10. The first adhesive part 13 bonds multiple battery cells 12 together to form an integral structure, enhancing the connection strength between the battery cells 12. The adhesive part can also absorb some external impacts and vibrations, improving the overall structural stability and vibration resistance of the battery module 10.

[0051] It should be noted that the material of the first adhesive portion 13 is typically chosen to have insulating properties. Thus, the first adhesive portion 13 can provide a certain degree of electrical isolation, reducing the risk of short circuits and further ensuring the safety of the battery module 10. Specifically, the type of the first adhesive portion 13 can be selected as needed. For example, the first adhesive portion 13 may include at least one of thermally conductive adhesive, double-sided tape, structural adhesive, and foam. Specifically, in the embodiments of this application, the first adhesive portion 13 includes foam. The foam, through its unique expansion characteristics, fills the gaps, providing buffer protection for the cell 12 and enhancing the stability of the overall structure to a certain extent. Foam is lightweight, and its use can reduce the weight of the entire battery module 10. Foam not only provides excellent sound insulation but also effectively prevents heat transfer.

[0052] The value of the first installation gap can be selected as needed. For example, the first installation gap can be 2mm, 2.2mm, 2.5mm, 2.7mm, 2.9mm, 3mm, 3.2mm, 3.5mm, 3.7mm, 3.9mm, 4.2mm, 4.5mm, 4.7mm, 4.9mm, or 5mm, etc. Specifically, this application does not limit it in this regard.

[0053] Reference Figure 3 and Figure 4 In one embodiment, the battery module 10 further includes a bracket 14, which is installed inside the housing 11. The bracket 14 includes a support plate 141 and multiple protrusions 142. The support plate 141 is provided with multiple through holes 1411 for supporting multiple battery cells 12. The multiple through holes 1411 correspond to the explosion-proof valves of the battery cells 12. In this way, it is ensured that if a battery cell 12 fails or overheats, the gas generated when the explosion-proof valve is activated can be directly discharged through the corresponding through hole 1411, avoiding pressure increase caused by gas accumulation, thereby reducing the risk of explosion. Multiple protrusions 142 are spaced apart and protrude from the side of the support plate 141 opposite to the battery cell 12. Each protrusion 142 abuts against the inner wall of the housing 11, creating a space between the support plate 141 and the inner wall of the housing 11 to form a smoke exhaust channel 15. This channel 15 allows gases discharged from the explosion-proof valve to dissipate rapidly, further improving the safety of the battery module 10. The smoke exhaust channel 15 not only discharges potentially hazardous gases but also serves as an additional airflow path, aiding in heat dissipation within the battery module 10. This reduces the operating temperature of the battery cell 12, extends its lifespan, and minimizes safety hazards caused by high temperatures.

[0054] It should be noted that, referring to Figure 1 The casing 11 has a smoke vent 117 on its side, which is connected to the smoke exhaust channel 15 and open to the outside atmosphere. This allows the gas in the smoke exhaust channel 15 to be exhausted outside the battery module 10, improving the safety of the battery module 10. Additionally, outside air can also enter the smoke exhaust channel 15 through the smoke vent 117, exchanging heat with the battery cell 12 to cool it down and improve the heat dissipation efficiency of the battery module 10.

[0055] Reference Figure 2The housing 11 includes a main body 118 and a cover 119, which are interlocked to enclose an installation space for mounting multiple battery cells 12. The main body 118 and the cover 119 are detachable. This detachable design allows technicians to easily open the cover 119 and quickly access the multiple battery cells 12 inside the battery pack for inspection, testing, or replacement. When repair of a specific battery cell 12 or other internal components is required, simply removing the cover 119 allows for direct operation, greatly simplifying the repair process.

[0056] Reference Figure 5 and Figure 6 Secondly, embodiments of this utility model also provide a battery pack, which includes a housing 20 and a plurality of battery modules 10 as described above, wherein the plurality of battery modules 10 are installed inside the housing 20. The specific structure of the battery module 10 is as described in the above embodiments. Since this battery pack adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0057] Reference Figure 5 In one embodiment, multiple battery modules 10 are arranged sequentially and all connected to the bottom of the housing 20. This creates a more compact integrated structure between the battery modules 10 and the housing 20, reducing relative movement between internal components and enhancing the rigidity and impact resistance of the entire battery pack. When subjected to external impact, all components work together as a whole to bear the force, thereby improving the overall stability and resistance to deformation of the battery pack structure. Centralizing the battery modules 10 and connecting them to the bottom of the housing 20 simplifies electrical connection paths, reduces cable length and complexity, and facilitates installation and subsequent maintenance. Furthermore, the sequential arrangement of multiple battery modules 10 and their connection to the bottom of the housing 20 allows for a lateral arrangement within the housing 20, lowering the overall center of gravity of the battery pack, reducing the risk of tilting during movement, and improving stability and maneuverability.

[0058] Reference Figure 2 , Figure 3 and Figure 5 In one embodiment, multiple battery cells 12 extend along a first direction and are stacked along a second direction. The first direction is parallel to the extended plane of the bottom of the housing 20, and the second direction is perpendicular to the extended plane of the bottom of the housing 20. This arrangement allows the multiple battery cells 12 in each battery module 10 to lie flat and be stacked along the second direction, minimizing the footprint of a single battery module 10 at the bottom of the housing 20. This allows for the placement of as many battery modules 10 as possible at the bottom of the housing 20, thereby increasing the energy density and total capacity of the battery pack.

[0059] Reference Figure 5 and Figure 6 In one embodiment, a second mounting gap exists between two adjacent battery modules 10. The battery pack also includes a second adhesive portion 30, which fills the mounting gaps to bond the multiple battery modules 10 together. This securely bonds the multiple battery modules 10 together, forming a more robust whole. This helps improve the overall mechanical strength of the battery pack, preventing relative displacement or loosening between the battery modules 10 during transportation or use due to vibration, collisions, or other factors. Furthermore, the adhesive bonding method simplifies the battery pack assembly process and reduces production costs. In addition, the bonding operation is simple and quick, improving production efficiency.

[0060] It should be noted that the material of the second adhesive portion 30 is typically chosen to have insulating properties. Thus, the second adhesive portion 30 can provide a certain degree of electrical isolation, reducing the risk of short circuits and further ensuring the safety of the battery pack. Specifically, the type of the second adhesive portion 30 can be selected as needed. For example, the second adhesive portion 30 may include at least one of thermally conductive adhesive, double-sided tape, structural adhesive 40, and expanding foam. Specifically, in the embodiments of this application, the second adhesive portion 30 includes expanding foam. Expanding foam fills gaps through its unique expansion characteristics, providing cushioning protection for the battery module 10 and enhancing the stability of the overall structure to a certain extent. Expanding foam is lightweight, and its use can reduce the weight of the entire battery pack. Expanding foam not only provides excellent sound insulation but also effectively prevents heat transfer.

[0061] In one embodiment, the second mounting gap is G2, where 3mm ≤ G2 ≤ ​​8mm. Thus, controlling the second mounting gap between 3mm and 8mm ensures necessary functional requirements while maximizing the use of the internal space of the housing 20, thereby improving the overall energy density of the battery pack. Controlling the second mounting gap within this range avoids wasting space and provides sufficient margin for heat dissipation and assembly of the battery module 10. This 3mm-8mm range also allows the second mounting gap to serve as an airflow path between adjacent battery modules 10, helping to dissipate heat generated by the cells 12 during operation and reducing the occurrence of localized hot spots. In dynamic environments, the battery module 10 may be subjected to external impacts or vibrations; the 3mm-8mm gap provides buffer space for minor displacements between modules, preventing mechanical damage caused by direct contact. The second adhesive portion 30 fills the 3mm-8mm gap, effectively absorbing vibration and impact forces, further enhancing the overall structural stability of the battery pack. Simultaneously, this gap range also provides favorable conditions for the uniform distribution of the adhesive material. The 3mm to 8mm gap makes it easier to fill the second adhesive part 30 evenly, reducing assembly difficulty and time cost.

[0062] It should be noted that if the gap exceeds 8mm, a large amount of unused space will exist inside the casing 20, reducing the energy density of the battery pack. If the gap is less than 3mm, heat may be difficult to dissipate effectively, and it may also be difficult to fill the second adhesive part 30.

[0063] Furthermore, the value of the second installation gap can be selected as needed. For example, the second installation gap can be 3mm, 3.5mm, 3.9mm, 4mm, 4.5mm, 4.9mm, 5.2mm, 5.7mm, 6mm, 6.7mm, 6.9mm, 7mm, 7.7mm, or 8mm, etc. Specifically, this application does not limit it in this regard.

[0064] Reference Figure 1 and Figure 5 In one embodiment, the housing 11 includes a positioning sidewall 111 and a positioning bottom wall 112. The battery pack also includes structural adhesive 40, with the positioning sidewall 111 and / or the positioning bottom wall 112 connected to the inner wall of the housing 20 via the structural adhesive 40. Thus, by using structural adhesive 40 to firmly connect the positioning sidewall 111 and / or the positioning bottom wall 112 to the inner wall of the housing 20, the structural rigidity and impact resistance of the entire battery pack can be significantly improved. The connection method using structural adhesive 40 can effectively absorb and disperse vibration energy, protecting the internal battery cells 12 from external vibrations. Using structural adhesive 40 simplifies the assembly process and improves assembly efficiency.

[0065] In one embodiment, at least one of the positioning sidewall 111 and the positioning bottom wall 112 is provided with a positioning part, and the inner wall of the housing 20 is provided with a mating part. One of the positioning part and the mating part includes a boss, and the other includes a groove. Thus, the boss and groove design of the positioning part and the mating part ensures accurate alignment of the housing 11 during installation, avoiding misalignment caused by human error and improving assembly efficiency. During transportation or use, the battery pack may be subjected to external impacts or vibrations, and the engagement of the boss and groove can effectively limit the movement of the housing 11 within the housing 20, preventing displacement or loosening, thereby improving overall reliability. The boss and groove design not only serves a positioning function but also increases the contact area between the housing 11 and the inner wall of the housing 20, further enhancing the connection strength. This mechanical interlocking method is more robust and simpler to operate than simple adhesive or fastener connections. In vehicle driving or other dynamic application scenarios, the engagement of the boss and groove can absorb some impact force and disperse stress, thereby protecting the internal cells 12 from damage and improving the overall impact resistance of the battery pack. The design of the boss and groove does not require a lot of extra space, and can achieve efficient positioning and fixing functions within a limited space.

[0066] Reference Figure 1 and Figure 5In one embodiment, the housing 11 further includes a mounting sidewall 113 disposed opposite to the positioning sidewall 111, and the battery pack further includes a screw connector 60. The mounting sidewall 113 is screwed to the housing 20 via the screw connector 60. Thus, by using the screw connector 60 to fix the mounting sidewall 113 to the housing 20, the screw connection provides stronger tensile and compressive strength, ensuring that the battery module 10 will not shift or loosen during transportation and use. The screw connector 60 allows for precise adjustment and tightening, enabling the mounting sidewall 113 to be accurately aligned with the inner wall of the housing 20, ensuring the positional accuracy of the battery module 10 within the housing 20. In vehicle driving or other dynamic environments, the screw-fixed mounting sidewall 113 effectively prevents displacement caused by vibration, ensuring that the battery module 10 is always in optimal working condition. When it is necessary to replace or repair a battery module 10, the operation can be easily completed by loosening the corresponding screw connector 60 without damaging the overall structure, greatly improving maintenance efficiency.

[0067] In addition, the positioning sidewall 111 is connected to the housing 20 using structural adhesive 40, and the mounting sidewall 113 is connected to the housing 20 using screws 60. The structural adhesive 40 provides uniform and strong adhesion, while the screws 60 add additional physical locking, ensuring that the battery module 10 will not shift or loosen under various operating conditions. The structural adhesive 40 and the screws 60 work together to more effectively disperse the stress caused by external impacts and vibrations, reducing the risk of structural damage caused by local stress concentration, thereby improving overall safety and durability. The structural adhesive 40 can fill tiny gaps without significantly increasing thickness, allowing the positioning sidewall 111 to fit tightly against the inner wall of the housing 20, maximizing the use of internal space. The structural adhesive 40 provides a good adhesive foundation during initial positioning, ensuring that the positioning sidewall 111 can be accurately aligned and firmly adhered to the inner wall of the housing 20; while the screws 60 allow for precise adjustment and tightening of the position of the mounting sidewall 113, simplifying the operation steps in the assembly process and improving work efficiency. During transportation or use, especially when facing challenges such as vibration and temperature changes, the dual fixing mechanism of structural adhesive 40 and screw fastener 60 can effectively prevent any part from shifting or loosening, maintaining the optimal working condition of the battery module 10.

[0068] It should be noted that the number of screw connectors 60 can be selected as needed, and this application does not limit this.

[0069] Reference Figure 6In one embodiment, the battery pack further includes a third adhesive portion 70, through which the plurality of battery modules 10 are bonded and fixed to at least a portion of the sidewalls of the housing 20. By using the third adhesive portion 70 to bond and fix the battery modules 10 to the sidewalls of the housing 20, a more robust integral structure can be formed, enhancing the battery pack's ability to resist external impacts and vibrations. The application of the third adhesive portion 70 can fill tiny gaps without increasing the thickness, allowing the battery modules 10 to fit tightly against the inner wall of the housing 20, maximizing the use of internal space and improving energy density. The operation of bonding and fixing the battery modules 10 to the sidewalls of the housing 20 with the third adhesive portion 70 is simple and quick, improving production efficiency.

[0070] It should be noted that the material of the third adhesive portion 70 is typically chosen to have insulating properties. Thus, the third adhesive portion 70 can provide a certain degree of electrical isolation, reducing the risk of short circuits and further ensuring the safety of the battery pack. Specifically, the type of the third adhesive portion 70 can be selected as needed. For example, the third adhesive portion 70 may include at least one of thermally conductive adhesive, double-sided tape, structural adhesive 40, and expanding foam. Specifically, in the embodiments of this application, the third adhesive portion 70 includes expanding foam. Expanding foam fills gaps through its unique expansion characteristics, providing cushioning protection for the battery module 10 and enhancing the stability of the overall structure to a certain extent. Expanding foam is lightweight, and its use can reduce the weight of the entire battery pack. Expanding foam not only provides excellent sound insulation but also effectively prevents heat transfer.

[0071] Reference Figure 1 , Figure 5 and Figure 6In one embodiment, the housing 11 is stepped, including a first stepped surface 114, a connecting surface 115, and a second stepped surface 116 connected sequentially. Both the first stepped surface 114 and the second stepped surface 116 are opposite to the bottom of the housing 20, with the second stepped surface 116 located between the first stepped surface 114 and the bottom of the housing 20. Thus, a gap is formed between the first stepped surface 114, the connecting surface 115, and the second stepped surface 116, providing space for the installation of other structures. Furthermore, the stepped design of the housing 11 creates a multi-layered support structure inside the battery pack, enhancing the overall mechanical strength of the battery pack and improving its resistance to external impacts and vibrations. The battery pack also includes a first clamping part 80 and a second clamping part 90. The first clamping part 80 is connected to multiple first stepped surfaces 114, and at least a portion of the second clamping part 90 is connected to multiple second stepped surfaces 116. Thus, the first clamping part 80 connects multiple first step surfaces 114 into one unit, and the second clamping part 90 connects multiple second step surfaces 116 into one unit. This allows the first clamping part 80 and the second clamping part 90 to evenly distribute pressure onto multiple battery modules 10. This design avoids excessive local stress on a single module, thereby improving the mechanical strength of the entire battery pack. Through the transmission of force, multiple modules form a mutually supporting integral structure, avoiding module displacement or loosening caused by vibration, impact, or other external forces.

[0072] Reference Figure 5 , Figures 6 to 8 In one embodiment, the second pressing part 90 includes a pressing plate 91 and a plurality of connecting plates 92. The pressing plate 91 is connected to a plurality of second stepped surfaces 116, and the plurality of connecting plates 92 are sequentially connected along the circumference of the pressing plate 91 and are all connected to the pressing plate 91. This improves the stability and rigidity of the structure of the second pressing part 90. The plurality of connecting plates 92 includes a first connecting plate 921 and two second connecting plates 922 respectively disposed at both ends of the first connecting plate 921. The first connecting plate 921 is disposed opposite to and connected to the connecting surface 115, and the two second connecting plates 922 are connected to two side walls of the housing 20 that are disposed opposite to each other. In this way, the pressing plate 91 is directly connected to the plurality of second stepped surfaces 116, ensuring that the plurality of battery modules 10 will not undergo relative displacement or loosening during transportation and use. The first connecting plate 921 is connected to the connecting surface 115, which further enhances the rigidity and strength of the battery pack and ensures that the plurality of battery modules 10 will not undergo relative displacement or loosening during transportation and use. Two second connecting plates 922 are fixed to two opposite side walls of the housing 20, thereby achieving a fixed connection between multiple battery modules 10 and the housing 20 and preventing the multiple battery modules 10 from moving relative to the housing 20.

[0073] In addition, the pressure plate 91 and multiple connecting plates 92 not only serve a fixing function but also act as additional heat conduction paths, helping to dissipate the heat generated by the battery module 10 during operation. The pressure plate 91 and connecting plates 92 increase the surface area in contact with air, which helps improve natural convection efficiency, thereby better dissipating the heat generated by the battery module 10 during operation and reducing the risk of overheating. The design of the pressure plate 91 and connecting plates 92 facilitates precise alignment of multiple battery modules 10 during assembly, improving assembly efficiency. The multiple fixing mechanisms of the pressure plate 91 and multiple connecting plates 92 effectively prevent any battery module 10 from shifting or loosening, maintaining the optimal operating condition of the battery pack.

[0074] Thirdly, the embodiments of this utility model also propose an electrical device, which includes a battery pack as described above. The specific structure of the battery pack is as described in the above embodiments. Since this electrical device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here.

[0075] It should be noted that the electrical equipment can be vehicles, energy storage power supplies, consumer electronics, medical equipment, or smart cities, etc. Specifically, this application does not limit this.

[0076] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A battery module, characterized in that, include: case; Multiple battery cells are disposed within the housing, and a first installation gap G1 is provided between two adjacent battery cells, wherein 2mm≤G1≤5mm; A first adhesive portion is disposed within the housing and at least partially fills the plurality of first mounting gaps to bond the plurality of battery cells together as one unit.

2. The battery module according to claim 1, characterized in that, The first adhesive portion includes expanding foam.

3. The battery module according to claim 1 or 2, characterized in that, It also includes a bracket, which is installed within the housing, and the bracket includes: The support plate is provided with multiple through holes, and the support plate is used to support multiple battery cells. The multiple through holes correspond to the explosion-proof valves of the battery cells. Multiple protrusions are spaced out on the side of the support plate opposite to the battery cell. Each of the protrusions abuts against the inner wall of the housing, so that the support plate and the inner wall of the housing are spaced apart and form a smoke exhaust channel, which is used to discharge the gas discharged by the explosion-proof valve.

4. A battery pack, characterized in that, include: Box; A plurality of battery modules as described in any one of claims 1 to 3, wherein the plurality of battery modules are installed in the housing.

5. The battery pack according to claim 4, characterized in that, Multiple battery modules are arranged sequentially and are all connected to the bottom of the housing.

6. The battery pack according to claim 4, characterized in that, The multiple battery cells are arranged to extend along a first direction and stacked along a second direction. The first direction is parallel to the extended plane of the bottom of the housing, and the second direction is perpendicular to the extended plane of the bottom of the housing.

7. The battery pack according to claim 4, characterized in that, There is a second mounting gap between two adjacent battery modules; The battery pack further includes a second adhesive portion that fills the plurality of mounting gaps to bond the plurality of battery modules together.

8. The battery pack according to claim 7, characterized in that, The second installation gap is G2, where 3mm≤G2≤8mm.

9. The battery pack according to any one of claims 4 to 8, characterized in that, The housing includes a positioning sidewall and a positioning bottomwall; The battery pack also includes structural adhesive, and the positioning sidewall and / or the positioning bottom wall are connected to the inner wall of the housing through the structural adhesive.

10. The battery pack according to claim 9, characterized in that, At least one of the positioning sidewall and the positioning bottom wall is provided with a positioning part, and the inner wall of the box is provided with a mating part. One of the positioning part and the mating part includes a boss, and the other includes a groove.

11. The battery pack according to claim 9, characterized in that, The housing also includes a mounting sidewall disposed opposite to the positioning sidewall; The battery pack also includes a screw connector, and the mounting sidewall is screwed to the housing via the screw connector.

12. The battery pack according to any one of claims 4 to 8, characterized in that, It also includes a third adhesive part, through which the plurality of battery modules are bonded and fixed to at least a portion of the sidewalls of the housing.

13. The battery pack according to any one of claims 5 to 8, characterized in that, The shell is stepped, including a first stepped surface, a connecting surface and a second stepped surface connected in sequence. The first stepped surface and the second stepped surface are both opposite to the bottom of the box, and the second stepped surface is located between the first stepped surface and the bottom of the box. The battery pack further includes a first clamping part and a second clamping part, wherein the first clamping part is connected to a plurality of first stepped surfaces, and at least a portion of the second clamping part is connected to a plurality of second stepped surfaces.

14. The battery pack according to claim 13, characterized in that, The second clamping part includes: Pressure plate, connected to multiple second step surfaces; Multiple connecting plates are sequentially connected along the circumference of the pressure plate and are all connected to the pressure plate. The multiple connecting plates include a first connecting plate and two second connecting plates disposed at both ends of the first connecting plate. The first connecting plate is disposed opposite to and connected to the connecting surface, and the two second connecting plates are connected to two side walls of the housing that are disposed opposite to each other.

15. An electrical appliance, characterized in that, Includes the battery pack as described in any one of claims 4 to 14.

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